US3051470A - Pneumatic suspension for vehicles - Google Patents

Pneumatic suspension for vehicles Download PDF

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Publication number
US3051470A
US3051470A US850832A US85083259A US3051470A US 3051470 A US3051470 A US 3051470A US 850832 A US850832 A US 850832A US 85083259 A US85083259 A US 85083259A US 3051470 A US3051470 A US 3051470A
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US
United States
Prior art keywords
diaphragm
chamber
suspension
orifices
volume
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US850832A
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English (en)
Inventor
Boulet Georges
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Recherches Etudes Production REP SARL
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Recherches Etudes Production REP SARL
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
    • B60G15/12—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring and fluid damper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
    • F16F9/081—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall being of the fluid displacement type, i.e. the piston not comprising damping arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
    • F16F9/096—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall comprising a hydropneumatic accumulator of the membrane type provided on the upper or the lower end of a damper or separately from or laterally on the damper

Definitions

  • the suspension which is described is characterized in that it comprises a chamber having a volume variable as a function of the-load and two series of auxiliary chambers.
  • one of the said series of auxiliary chambers is in communication with the variable volume chamber while the other series of chambers does not communicate therewith.
  • All of these variable and non-variable volume chambers con tain an unvarying mass of gas and means are provided so that when the capacity of the variable volume chamber falls below the volume of reference corresponding to the static load of the vehicle, the auxiliary chambers of the second series are successively put into communication with the said variable volume chamber, while the chambers of the first series remain in communication with the said variable volume chamber.
  • the auxiliary chambers of the second series remain closed While those of the second series close in succession.
  • variable volume chamber is a chamber of cylindrical shape while the constant volume chambers were laterally disposed with respect to the cylinder and put into communication or out of communication with the said cylinder by the displacement of a movable piston in the said cylinder.
  • the present invention relates to a device for the practical application of the invention referred to above. It is of particularly simple design and of small overall dimensions and is therefore wholly suitable for a pneumatic suspension of vehicles.
  • variable volume chamber is a container having one wall formed by an elastic diaphragm stretched over a body inside which are arranged the constant volume chambers, and in that the orifices which cause the said constant volume chambers to communicate with the variable volume-chamber which surrounds these latter are disposed successively over the surface of the said body in such manner that the elastic deformation of the said diaphragm unmasks a series of orifices or closes another series of orifices according to whether the volume of the variable volume chamber falls below or rises above a position of reference, this position of reference being that which corresponds to the static charge only of the suspension.
  • FIG. 1 is a longitudinal cross-section taken along the line II of FIG. 2.
  • FIG. 2 is a transverse cross-section taken along the line 11-11 of FIG. 1.
  • l is a cylindrical chamber in which there is a moving piston 2.
  • the cylinder 1 is extended by a flared member 3 forming a kind of cup with which it communicates through passages 4.
  • An elastic diaphragm 5 which bears on the periphery of the cup closes this latter in a fluid-tight manner.
  • the chamber which extends from the piston 2 up to the diaphragm 5 is filled with a liquid such as oil, for example.
  • the elastic ma terial which constitutes the diaphragm is therefore chosen from those materials which cannot be attacked by the said liquid.
  • a member 6 in the shape of a bell, the edge of which bears on that of the diaphragm such that the diaphragm forms a fluid-tight joint between the bell member 6 and the flared member 3.
  • the member 6 defines a chamber with the diaphragm 5.
  • the bell 6 is surmounted by a hollow body 7 having the shape of a portion of a sphere, through which pass radial walls 3. These latter form, together with an axial core 9, spaces for a plurality of constant volume cells or compartments it), each of which communicates exteriorly of the body 7 through a passage 11.
  • the external orifices of these passages are arranged successively in relation to the axis of symmetry of the hollow body 7.
  • the body '7 is covered by a cap 12.
  • the said cap bears on an elastic diaphragm l3 and stretches the said diaphragm over the spherical body.
  • a ring 14, which rests on the edge of the flared member 3 is screwed into the skirt 15 of the cap 12, and insures the fluid-tightness of the joints formed by the edges of the two diaphragms.
  • On each side of the elastic diaphragm 13 are formed two annular spaces 16 and 17 located one above the other. Passages 18 cause the chamber defined by bell s and diaphragm 5 to communicate with the annular space 17.
  • the passages 11 are spaced apart in the direction of the axis of the core 9.
  • the volume between the bell 6 and the diaphragm 5, the annular spaces in and 17 as Well as the cells ill are filled with a mass of inert gas such as nitrogen, for example, pre-determined so that the pressure of the said gas balances the static load supported by the device.
  • a mass of inert gas such as nitrogen, for example, pre-determined so that the pressure of the said gas balances the static load supported by the device.
  • the chamber defined between the diaphragm 5 and the bell 6, the system of passages 1% and the annular space 17 constitute in their combined form the variable volume chamber as defined in the above numbered patent, While the cells Jill constitute the constant volume chambers.
  • passages 18 which open beneath the bell 6 are also staggered in height. This has for its object the closing of the said passages successively in such manner as to stiffen the suspension, as may be required, towards the end of the largest amplitudes of movement in the direction of the compression, in the case of particularly violent shocks.
  • the body containing the constant volume cells, the elastic diaphragm which masks and unmasks the orifices and the cap which rests on the said diaphragm can very easily be separated from the suspension members which cause the volume of the variable volume chamber to vary. They can therefore be housed in any suitable emplacement and coupled by means of a piping system to the said members, the position of which is coupled to the position of the axles.
  • a suspension comprising first and second members defining a space; a first elastic diaphragm sealably engaged between said members defining first and second chambers in said space, a cylindrical body coupled to one of the members and communicating with said first chamher, a piston displaceable in said cylindrical body to exert pressure in said first chamber, a liquid enclosed between the piston and the diaphragm, a hollow body on the other of said members, said hollow body including in part a spherical surface, said hollow body being provided with a plurailty of compartments and an orifice for each of said compartments opening externally of said body, the orifices being spaced longitudinally along said hollow body, a hollow cap over said hollow body and the other of said members and defining a space therewith, a second elastic diaphragm in the latter said space and sealably engaged between said hollow body and said hollow cap, said second elastic diaphragm being stretched over said spherical surface of the hollow body and dividing said latter space into two annular spaces, said other member being
  • a suspension as claimed in claim 1 comprising a plurality of radial walls in said hollow body to define said compartments, said hollow body having an axis, said radial walls defining planes passing through the axis of said hollow body.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Devices Of Dampers And Springs (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)
US850832A 1958-11-15 1959-11-04 Pneumatic suspension for vehicles Expired - Lifetime US3051470A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR779211A FR1217045A (fr) 1958-11-15 1958-11-15 Suspension pneumatique, notamment pour véhicules

Publications (1)

Publication Number Publication Date
US3051470A true US3051470A (en) 1962-08-28

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ID=8708310

Family Applications (1)

Application Number Title Priority Date Filing Date
US850832A Expired - Lifetime US3051470A (en) 1958-11-15 1959-11-04 Pneumatic suspension for vehicles

Country Status (4)

Country Link
US (1) US3051470A (fr)
DE (1) DE1164850B (fr)
FR (1) FR1217045A (fr)
GB (1) GB879494A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212768A (en) * 1962-03-13 1965-10-19 Daimler Benz Ag Hydro-pneumatic shock absorber
FR2494799A1 (fr) * 1980-11-27 1982-05-28 Integral Hydraulik Co Unite de tension hydropneumatique, notamment destinee a etre utilisee dans les vehicules a chaines de roulement pour charger la roue de renvoi en antagonisme par rapport a la tension de la chaine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5376271A (en) * 1976-12-20 1978-07-06 Tokico Ltd Gas spring
DE4002882C1 (en) * 1989-08-12 1991-02-28 Boge Ag, 5208 Eitorf, De Hydraulic shock absorber with damping liq. contg. cylinder - has several passages and couplers, each on different partial diameters

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2370942A (en) * 1942-09-23 1945-03-06 Wagner Electric Corp Piston construction
FR1100585A (fr) * 1966-04-05 1955-09-21 Rech S Pour L Applic Ind Des B Suspension pour véhicule ou autres applications

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE610541C (de) * 1932-11-13 1935-03-15 Wilhelm Langguth Stossdaempfer mit mehreren Verdichtungsraeumen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2370942A (en) * 1942-09-23 1945-03-06 Wagner Electric Corp Piston construction
FR1100585A (fr) * 1966-04-05 1955-09-21 Rech S Pour L Applic Ind Des B Suspension pour véhicule ou autres applications

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212768A (en) * 1962-03-13 1965-10-19 Daimler Benz Ag Hydro-pneumatic shock absorber
FR2494799A1 (fr) * 1980-11-27 1982-05-28 Integral Hydraulik Co Unite de tension hydropneumatique, notamment destinee a etre utilisee dans les vehicules a chaines de roulement pour charger la roue de renvoi en antagonisme par rapport a la tension de la chaine

Also Published As

Publication number Publication date
DE1164850B (de) 1964-03-05
FR1217045A (fr) 1960-04-29
GB879494A (en) 1961-10-11

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